Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie o powertrain para kmd e c40lf.
 ###Tabelas: CREATE TABLE current_bus_fleet_roster (current_bus_fleet_roster_id AUTO_INCREMENT PRIMARY KEY, Order Year INT, Fleet Series (Qty.) VARCHAR, Manufacturer VARCHAR, Model VARCHAR, Powertrain (Engine/Transmission) VARCHAR, Fuel or Propulsion VARCHAR, Division VARCHAR) CREATE TABLE racing_vehicles (racing_vehicles_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Year VARCHAR, Type VARCHAR, Engine VARCHAR, Displacement cc VARCHAR) CREATE TABLE most_densely_populated_islands_over_1000_people_per_km² (most_densely_populated_islands_over_1000_people_per_km²_id AUTO_INCREMENT PRIMARY KEY, Island VARCHAR, Country VARCHAR, Population VARCHAR, Area km² VARCHAR, Density (per km²) VARCHAR) CREATE TABLE former_stations (former_stations_id AUTO_INCREMENT PRIMARY KEY, Station VARCHAR, Municipality VARCHAR, County VARCHAR, Former railroad VARCHAR, Closed INT) CREATE TABLE main_towns_cities_served (main_towns_cities_served_id AUTO_INCREMENT PRIMARY KEY, Place VARCHAR, Population INT, Ceremonial County VARCHAR, Main Railway station VARCHAR, Motorway junction VARCHAR)  
SELECT Powertrain (Engine/Transmission) FROM current_bus_fleet_roster WHERE Division = KMD AND Model = C40LF